hp/torque mods and dyno sheets

[Steel]

I have been reading some of the posts over the last several months as well as checking out some of the dyno sheets. Horsepower and torque are great, but the rewards don't seem to be in the area where you do most of the riding...2500rpm to 4500rpm. I guess if you are cranking the higher rpms through the gears you reap the benefits but not so much in the cruising range. Anyone care to comment on that.

I like the dual personality of my bike. 2500-4500 she is almost like she was stock, powerful but smooth and predictable. That's really a plus riding 2 up.
Above 5000 the power comes on like she's trying to throw me off the back.

I really realized the purpose of the bipolar attitude when riding 2 up with friends. We were rolling along about 70 mph when the front bike signaled for me to take the lead since I was more familiar with the area. I dropped it to 3rd and rolled on it a little hard. It started picking up speed, then the front tire lifted as it started hitting the power band. I couldn't imagine having a passenger with that much torque and hp down low. I'd have to be way too careful with the throttle, even at walking speeds.

Plus with all of the fun power at the higher rpms, I can cruise at 3000-3500 and get 37.5 mpg. Seems like a win win to me.

 

[Steel]

Makes sense...Explain S/C

S/C = super charger

 

[ThingKing]

I have been reading some of the posts over the last several months as well as checking out some of the dyno sheets. Horsepower and torque are great, but the rewards don't seem to be in the area where you do most of the riding...2500rpm to 4500rpm. I guess if you are cranking the higher rpms through the gears you reap the benefits but not so much in the cruising range. Anyone care to comment on that.

I think if you don't open the engine, you will not lose any grunt. It's probably enough to just let her breathe.
A stock Touring has about 95hp at the rear wheel, and it can make another 60-70hp with just a good pipe, filter and tune!

I did that to my Roadster, and it came back from the tuner with a 40hp gain, and over 30rwhp at just 1300rpm.

 

[1olbull]

Do you currently have TORs? If so, you can do the triple filters for $150. Then buy a pcv and get it tuned.

If your tuner knows Tune ECU, why uses a PCV?

 

[dougl]

If your tuner knows Tune ECU, why uses a PCV?

My tuner doesn't use Tuneboy or TuneECU.

 

[Mittzy]

The nice thing about the stock bikes is that they run really well. Once you start mucking around you open a can of worms.

I respectfully disagree - you just need the right people doing the work and tuning...

 

[dougl]

I respectfully disagree - you just need the right people doing the work and tuning...

I respectfully agree, but it's frequently easier said than done. It's also a matter of how motivated you are to get these mods done right. Like driving 600 miles and staying over night in another state was not my cup of tea.

 

[Mittzy]

I have been reading some of the posts over the last several months as well as checking out some of the dyno sheets. Horsepower and torque are great, but the rewards don't seem to be in the area where you do most of the riding...2500rpm to 4500rpm. I guess if you are cranking the higher rpms through the gears you reap the benefits but not so much in the cruising range. Anyone care to comment on that.

Its all in the cams...
I have Lush cams and some head work with high compression pistons and my torque is exactly where it needs to be - I don't need to wring its neck to get to my peak torque.
The torque curve would be better (No dip at 3000-4000 rpm) if I had a complete exhaust system instead of a half half system (Reband/CES).
Just a snap of the throttle in first and this will break traction with in the torque curve- effortlessly.

 

[Mittzy]

I respectfully agree, but it's frequently easier said than done. It's also a matter of how motivated you are to get these mods done right. Like driving 600 miles and staying over night in another state was not my cup of tea.

Yeah - Maybe we are a bit spoilt - although Neville Lush is 2,000klms away but he is helpful to a few good tuners downunder.

 

[dougl]

Yeah - Maybe we are a bit spoilt - although Neville Lush is 2,000klms away but he is helpful to a few good tuners downunder.

Some of us are more avid than others. After riding my 2005 R3 for 8 years, I was bored with it. I talked to Carpenter about the upgrade and got shipping rates. But then I talked myself into quiting motorcycles and sold it. Within 3 months I bought a new T-Bird. With the 1700 upgrade I had spent 3 times more than the Carpenter upgrade would have cost. Within 2 years, that bike got boring and I sold it. Now I have the 2007 Classic with 162 ft lbs. I think I'll just stick with this.